Valve unit



FIG. 1 is a perspective view of a valve unit;

FIG. 2 is a front view of the valve unit;

FIG. 3 is a rear view of the valve unit;

FIG. 4 is a top view of the valve unit;

FIG. 5 is a bottom view of the valve unit;

FIG. 6 is a left side view of the valve unit; and,

FIG. 7 is right side view of the valve unit.

CLAIM The ornamental design for a valve unit, as shown and described. 